Acceleration sensor

Details Acceleration sensor Acceleration sensor

2008-11-07

2009-12-01

Williams, Hezron (Department: 2856)

Measuring and testing

Speed, velocity, or acceleration

Acceleration determination utilizing inertial element

C073S514160, C073S514290

Reexamination Certificate

active

07624639

ABSTRACT:
An acceleration sensor includes a detection element having a plurality of piezoelectric ceramic layers laminated together and a pair of retaining members that retain an end portion of the detection element in a longitudinal direction thereof at two principal surfaces of the end portion. The detection element includes electrodes between the ceramic layers and on principal surfaces. The detection element obtains a voltage or a charge generated in the detection element in response to an application of acceleration from the principal-surface electrodes and the interlayer electrodes. The piezoelectric ceramic layers are not polarized in areas between the principal-surface electrodes and the interlayer electrodes within a retaining area in which the detection element is retained by the retaining members.

REFERENCES:
patent: 5734107 (1998-03-01), Boehm et al.
patent: 6500715 (2002-12-01), Matsuzaki et al.
patent: 7168321 (2007-01-01), Terada et al.
patent: 2003/0217598 (2003-11-01), Tabota
patent: 01-232267 (1989-09-01), None
patent: 2005-164505 (2005-06-01), None
Official Communication issued in International Patent Application No. PCT/JP2007/054934, mailed on Jun. 19, 2007.

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